Wishing a very happy publication day to Isabella Tree. Her new work of non-fiction, Wilding: The Return of Nature to a British Farm is available to buy (and devour) now from Picador.

Forced to accept that intensive farming on the heavy clay of their land at Knepp in West Sussex was economically unsustainable, Isabella Tree and her husband Charlie Burrell made a spectacular leap of faith: they decided to step back and let nature take over. Thanks to the introduction of free-roaming cattle, ponies, pigs and deer – proxies of the large animals that once roamed Britain – the 3,500 acre project has seen extraordinary increases in wildlife numbers and diversity in little over a decade.

Once-common species, including turtle doves, nightingales, peregrine falcons, lesser spotted woodpeckers and purple emperor butterflies, are now breeding at Knepp, and populations of other species are rocketing. The Burrells’ degraded agricultural land has become a functioning ecosystem again, heaving with life – all by itself.

This recovery has taken place against a backdrop of catastrophic loss elsewhere. According to the 2016 ‘State of Nature’ report, the UK is ranked 29th in the world for biodiversity loss: 56% of species in the UK are in decline and 15% are threatened with extinction. We are living in a desert, compared with our gloriously wild past.

In Wilding, Isabella Tree tells the story of the ‘Knepp experiment’ and what it reveals of the ways in which we might regain that wilder, richer country. It shows how rewilding works across Europe; that it has multiple benefits for the land; that it can generate economic activity and employment; how it can benefit both nature and us – and that all of this can happen astonishingly quickly. Part gripping memoir, part fascinating account of the ecology of our countryside, Wilding is, above all, an inspiring story of hope.